CN108344930B - Device and method for monitoring temperature and partial discharge of ring main unit - Google Patents
Device and method for monitoring temperature and partial discharge of ring main unit Download PDFInfo
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- CN108344930B CN108344930B CN201810099012.2A CN201810099012A CN108344930B CN 108344930 B CN108344930 B CN 108344930B CN 201810099012 A CN201810099012 A CN 201810099012A CN 108344930 B CN108344930 B CN 108344930B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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Abstract
The invention discloses a device and a method for monitoring temperature and partial discharge of a ring main unit, wherein the device comprises the following steps: the device comprises a signal processing and control unit and a temperature monitoring unit; the central processing unit is connected with the bus control unit, the signal transmitting unit and the signal receiving unit, the bus control unit is connected with the signal transmitting unit and the signal receiving unit, and the first ultrahigh frequency antenna is connected with the signal transmitting unit and the signal receiving unit; the second ultrahigh frequency antenna is connected with the ultrahigh frequency-to-direct current converter unit, the ultrahigh frequency instruction extraction unit and the ultrahigh frequency data modulation unit; the ultrahigh frequency-to-direct current converter unit is connected with the ultrahigh frequency tag chip and the temperature sensor; the ultrahigh frequency label chip is connected with the ultrahigh frequency instruction extraction unit, the ultrahigh frequency data modulation unit and the temperature sensor. The invention can simultaneously perform two functions of temperature monitoring and partial discharge early warning of the ring main unit, can save the arrangement space of the sensors in the ring main unit, and is suitable for intensive and miniaturized ring main units.
Description
Technical Field
The invention belongs to the technical field of ring main unit monitoring, and particularly relates to a device and a method for monitoring the temperature and partial discharge of a ring main unit.
Background
The ring main unit is a commonly used switching unit in a power supply system, and the normal operation of the ring main unit is an important guarantee for the safety and stability of power supply. The rapid deterioration failure and the local temperature overheating of the insulation caused by the local discharge are common fault reasons of the ring main unit, so that the local discharge and temperature monitoring of the ring main unit have important significance for state evaluation and fault early warning of the ring main unit.
At present, the common ring main unit partial discharge monitoring methods include a transient low-voltage partial discharge monitoring method and an ultrasonic partial discharge monitoring method; common temperature monitoring methods include a current transformer monitoring method, a surface acoustic wave monitoring method, infrared imaging monitoring and the like; the existing monitoring method generally has the following problems: with the increasing intensification and miniaturization of the ring main unit, the existing traditional monitoring method is difficult to adapt to the current rapidly-increasing online monitoring requirement.
Disclosure of Invention
The invention aims to provide a device and a method for monitoring the temperature and partial discharge of a ring main unit, so as to solve the technical problems. The monitoring device can be used for online real-time monitoring of the temperature and partial discharge of the ring main unit, and is suitable for intensive and miniaturized ring main units.
In order to achieve the purpose, the invention adopts the following technical scheme:
a monitoring device for temperature and partial discharge of a ring main unit comprises: the device comprises a signal processing and control unit and a temperature monitoring unit; the signal processing and controlling unit comprises a bus controlling unit, a signal transmitting unit, a signal receiving unit, a central processing unit and a first ultrahigh frequency antenna, the central processing unit is respectively connected with the bus controlling unit, the signal transmitting unit and the signal receiving unit through signal lines, the bus controlling unit is respectively connected with the signal transmitting unit and the signal receiving unit through the signal lines, and the first ultrahigh frequency antenna is respectively connected with the signal transmitting unit and the signal receiving unit through the signal lines; the temperature monitoring unit comprises a second ultrahigh frequency antenna, an ultrahigh frequency-to-direct current converter unit, an ultrahigh frequency instruction extracting unit, an ultrahigh frequency data modulating unit, an ultrahigh frequency tag chip and a temperature sensor; the second ultrahigh frequency antenna is respectively connected with the ultrahigh frequency-to-direct current converter unit, the ultrahigh frequency instruction extraction unit and the ultrahigh frequency data modulation unit through signal lines; the ultrahigh frequency-to-direct current converter unit is respectively connected with the ultrahigh frequency tag chip and the temperature sensor through power lines and can supply power to the ultrahigh frequency tag chip and the temperature sensor; the ultrahigh frequency tag chip is respectively connected with the ultrahigh frequency instruction extraction unit, the ultrahigh frequency data modulation unit and the temperature sensor through signal lines, and the temperature sensor can measure the temperature of the ring main unit.
Further, the first uhf antenna and the second uhf antenna perform signal transmission by uhf radio waves.
A method for monitoring temperature and partial discharge of a ring main unit is based on the device for monitoring temperature and partial discharge of the ring main unit, and specifically comprises the following steps:
step 1: the method comprises the steps that a central processing unit sends an instruction to a bus control unit, the bus control unit hands over a bus to a signal sending unit, the signal sending unit obtains the use right of the bus, and the signal sending unit sends a measuring signal through a first ultrahigh frequency antenna;
step 2: the temperature monitoring unit receives the measurement signal in the step 1 through a second ultrahigh frequency antenna and transmits the signal to the ultrahigh frequency-to-direct current converter unit and the ultrahigh frequency instruction extraction unit; the ultrahigh frequency-to-direct current converter unit converts an ultrahigh frequency signal into direct current voltage to supply power to the ultrahigh frequency tag chip and the temperature sensor, the ultrahigh frequency instruction extraction unit converts the ultrahigh frequency signal into an instruction signal to start the ultrahigh frequency tag chip, and the ultrahigh frequency tag chip reads temperature data measured by the temperature sensor; the ultrahigh frequency tag chip encodes the read temperature data and transmits the encoded temperature data to the ultrahigh frequency data modulation unit, the ultrahigh frequency data modulation unit modulates the temperature data to an ultrahigh frequency band and transmits the modulated temperature data to the second ultrahigh frequency antenna, and the second ultrahigh frequency antenna sends an ultrahigh frequency signal;
and step 3: the first ultrahigh frequency antenna receives the ultrahigh frequency signal in the step 2, the bus control unit sends an instruction to the bus control unit through the central processing unit, the bus control unit hands over the bus to the signal receiving unit, the signal receiving unit firstly transmits the ultrahigh frequency signal received by the ultrahigh frequency antenna to the central processing unit, the central processing unit verifies the received ultrahigh frequency signal, the temperature data can successfully pass the verification after being coded by the ultrahigh frequency tag chip, and the partial discharge signal cannot successfully pass the verification after being coded;
and 4, step 4: repeating the step 1 to the step 3, and carrying out real-time online continuous monitoring;
and 5: and after the monitoring is finished, closing the signal processing and controlling unit.
Compared with the prior art, the invention has the following beneficial effects:
the monitoring device for the temperature and the partial discharge of the ring main unit can simultaneously perform two functions of temperature monitoring and partial discharge early warning of the ring main unit, can save the arrangement space of the sensors in the ring main unit, and is suitable for intensive and miniaturized ring main units. The first ultrahigh frequency antenna functions as: and sending a ultrahigh frequency command to the second ultrahigh frequency antenna, receiving an ultrahigh frequency signal of the second ultrahigh frequency antenna, and monitoring a partial discharge signal. When a local discharge ultrahigh-frequency signal with a large amplitude appears in the ring main unit, the ring main unit can submerge the temperature signal, and the check code set by the central processing unit can identify whether the ultrahigh-frequency signal is the temperature signal or the local discharge signal, so that the simultaneous online monitoring of the temperature and the local discharge is realized.
The monitoring method is convenient and fast to operate, and can be used for realizing simultaneous online monitoring of the temperature and the partial discharge of the ring main unit.
Drawings
Fig. 1 is a schematic overall structure diagram of a ring main unit temperature and partial discharge monitoring device according to the present invention;
FIG. 2 is a schematic view of the connection structure of FIG. 1;
in fig. 1 and 2, a signal processing and control unit 1; a bus control unit 101; a signal transmission unit 102; a signal receiving unit 103; a central processing unit 104; a first uhf antenna 105; a temperature monitoring unit 3; a second uhf antenna 301; an ultrahigh frequency-to-dc converter unit 302; an ultrahigh frequency instruction fetch unit 303; an ultrahigh frequency data modulation unit 304; an ultrahigh frequency tag chip 305; a temperature sensor 306.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
Referring to fig. 1 and fig. 2, the monitoring device for ring main unit temperature and partial discharge of the present invention includes: a signal processing and control unit 1 and a temperature monitoring unit 3.
The signal processing and control unit 1 includes a bus control unit 101, a signal transmitting unit 102, a signal receiving unit 103, a central processing unit 104, and a first uhf antenna 105. The central processing unit 104 is connected to the bus control unit 101, the signal transmitting unit 102, and the signal receiving unit 103 via signal lines, respectively, the bus control unit 101 is connected to the signal transmitting unit 102 and the signal receiving unit 103 via signal lines, respectively, and the first uhf antenna 105 is connected to the signal transmitting unit 102 and the signal receiving unit 103 via signal lines, respectively.
The temperature monitoring unit 3 comprises a second ultrahigh frequency antenna 301, an ultrahigh frequency-to-direct current converter unit 302, an ultrahigh frequency instruction extracting unit 303, an ultrahigh frequency data modulating unit 304, an ultrahigh frequency tag chip 305 and a temperature sensor 306; the second ultrahigh frequency antenna 301 is respectively connected with the ultrahigh frequency-to-dc converter unit 302, the ultrahigh frequency instruction extraction unit 303 and the ultrahigh frequency data modulation unit 304 through signal lines; the ultrahigh frequency-to-direct current converter unit 302 is respectively connected with the ultrahigh frequency tag chip 305 and the temperature sensor 306 through power lines, and the ultrahigh frequency-to-direct current converter unit 302 can supply power to the ultrahigh frequency tag chip 305 and the temperature sensor 306; the ultrahigh frequency tag chip 305 is respectively connected with the ultrahigh frequency instruction extraction unit 303, the ultrahigh frequency data modulation unit 304 and the temperature sensor 306 through signal lines, and the temperature sensor 306 can measure the temperature of the ring main unit; the first uhf antenna 105 and the second uhf antenna 301 perform signal transmission by radio waves.
In the monitoring device, the first ultrahigh frequency antenna has three functions, and sends an ultrahigh frequency command to the temperature monitoring unit, receives a temperature data signal returned by the temperature monitoring unit and monitors a partial discharge signal. When a partial discharge ultrahigh frequency signal with a larger amplitude appears in the ring main unit, the first ultrahigh frequency antenna 105 can simultaneously receive the partial discharge ultrahigh frequency signal and the temperature signal, and the partial discharge ultrahigh frequency signal can submerge the temperature signal; the temperature data collected by the temperature sensor 306 is coded in the ultrahigh frequency tag chip 305, the check code is added, whether the signal is a temperature signal or a partial discharge signal can be identified through the check code, and the two signals can be effectively separated in the central processing unit 104; the two functions of temperature monitoring and partial discharge early warning can be completed, and the arrangement space of the sensors in the ring main unit is saved.
A method for monitoring temperature and partial discharge of a ring main unit is based on the device for monitoring temperature and partial discharge of the ring main unit, and specifically comprises the following steps:
step 1: the central processing unit 104 sends an instruction to the bus control unit 101, the bus control unit 101 hands over the bus to the signal sending unit 102, the signal sending unit 102 obtains the bus use right, and the signal sending unit 102 sends out a measurement signal through the first ultrahigh frequency antenna 105;
step 2: the temperature monitoring unit 3 receives the measurement signal in the step 1 through the second ultrahigh frequency antenna 301, and transmits the signal to the ultrahigh frequency-to-direct current converter unit 302 and the ultrahigh frequency instruction extraction unit 303; the ultrahigh frequency-to-direct current converter unit 302 converts an ultrahigh frequency signal into direct current voltage to supply power to the ultrahigh frequency tag chip 305 and the temperature sensor 306, the ultrahigh frequency instruction extraction unit 303 converts the ultrahigh frequency signal into an instruction signal to start the ultrahigh frequency tag chip, and the ultrahigh frequency tag chip reads temperature data measured by the temperature sensor; the ultrahigh frequency tag chip encodes the read temperature data and transmits the encoded temperature data to the ultrahigh frequency data modulation unit 304, the ultrahigh frequency data modulation unit modulates the temperature data to an ultrahigh frequency band and transmits the modulated temperature data to the second ultrahigh frequency antenna, and the second ultrahigh frequency antenna sends an ultrahigh frequency signal;
and step 3: the first ultrahigh frequency antenna receives the ultrahigh frequency signal in the step 2, the bus control unit sends an instruction to the bus control unit through the central processing unit, the bus control unit hands over the bus to the signal receiving unit, the signal receiving unit firstly transmits the ultrahigh frequency signal received by the ultrahigh frequency antenna to the central processing unit, the central processing unit verifies the received ultrahigh frequency signal, the temperature data can successfully pass the verification after being coded by the ultrahigh frequency tag chip, and the partial discharge signal cannot successfully pass the verification after being coded;
and 4, step 4: repeating the step 1 to the step 3, and carrying out real-time online continuous monitoring;
and 5: and after the monitoring is finished, closing the signal processing and controlling unit.
Claims (3)
1. The utility model provides a looped netowrk cabinet temperature and partial discharge's monitoring devices which characterized in that includes: a signal processing and control unit (1) and a temperature monitoring unit (3);
the signal processing and controlling unit (1) comprises a bus control unit (101), a signal transmitting unit (102), a signal receiving unit (103), a central processing unit (104) and a first ultrahigh frequency antenna (105), wherein the central processing unit (104) is respectively connected with the bus control unit (101), the signal transmitting unit (102) and the signal receiving unit (103) through signal lines, the bus control unit (101) is respectively connected with the signal transmitting unit (102) and the signal receiving unit (103) through the signal lines, and the first ultrahigh frequency antenna (105) is respectively connected with the signal transmitting unit (102) and the signal receiving unit (103) through the signal lines;
the temperature monitoring unit (3) comprises a second ultrahigh frequency antenna (301), an ultrahigh frequency-to-direct current converter unit (302), an ultrahigh frequency instruction extracting unit (303), an ultrahigh frequency data modulating unit (304), an ultrahigh frequency tag chip (305) and a temperature sensor (306); the second ultrahigh frequency antenna (301) is respectively connected with the ultrahigh frequency-to-DC converter unit (302), the ultrahigh frequency instruction extraction unit (303) and the ultrahigh frequency data modulation unit (304) through signal lines; the ultrahigh frequency-to-direct current converter unit (302) is respectively connected with the ultrahigh frequency tag chip (305) and the temperature sensor (306) through power lines, and the ultrahigh frequency-to-direct current converter unit (302) can supply power to the ultrahigh frequency tag chip (305) and the temperature sensor (306); the ultrahigh frequency tag chip (305) is respectively connected with the ultrahigh frequency instruction extraction unit (303), the ultrahigh frequency data modulation unit (304) and the temperature sensor (306) through signal lines, and the temperature sensor (306) can measure the temperature of the ring main unit.
2. The ring main unit temperature and partial discharge monitoring device as claimed in claim 1, wherein the first uhf antenna (105) and the second uhf antenna (301) perform signal transmission via uhf radio waves.
3. A method for monitoring temperature and partial discharge of a ring main unit is characterized in that based on the device for monitoring temperature and partial discharge of the ring main unit in claim 1, the method specifically comprises the following steps:
step 1: the method comprises the steps that a central processing unit (104) sends an instruction to a bus control unit (101), the bus control unit (101) hands over a bus to a signal sending unit (102), the signal sending unit (102) obtains the use right of the bus, and the signal sending unit (102) sends out a measuring signal through a first ultrahigh frequency antenna (105);
step 2: the temperature monitoring unit (3) receives the measurement signal in the step 1 through a second ultrahigh frequency antenna (301), and transmits the measurement signal to an ultrahigh frequency-to-direct current converter unit (302) and an ultrahigh frequency instruction extraction unit (303); the ultrahigh frequency-to-direct current converter unit (302) converts an ultrahigh frequency signal into direct current voltage to supply power to the ultrahigh frequency tag chip (305) and the temperature sensor (306), the ultrahigh frequency instruction extraction unit (303) converts the ultrahigh frequency signal into an instruction signal to start the ultrahigh frequency tag chip (305), and the ultrahigh frequency tag chip (305) reads temperature data measured by the temperature sensor (306); the ultrahigh frequency tag chip (305) encodes the read temperature data and transmits the encoded temperature data to the ultrahigh frequency data modulation unit (304), the ultrahigh frequency data modulation unit (304) modulates the temperature data to an ultrahigh frequency band and transmits the modulated temperature data to the second ultrahigh frequency antenna (301), and the second ultrahigh frequency antenna (301) sends an ultrahigh frequency signal;
and step 3: the first ultrahigh frequency antenna (105) receives the ultrahigh frequency signal in the step 2, the instruction is sent to the bus control unit (101) through the central processing unit (104), the bus control unit (101) hands over the bus to the signal receiving unit (103), the signal receiving unit (103) transmits the ultrahigh frequency signal received by the first ultrahigh frequency antenna to the central processing unit (104), the central processing unit (104) verifies the received ultrahigh frequency signal, the temperature data can successfully pass the verification after being encoded by the ultrahigh frequency tag chip (305), and the partial discharge signal cannot successfully pass the verification without being encoded;
and 4, step 4: repeating the step 1 to the step 3, and carrying out real-time online continuous monitoring;
and 5: and (5) after the monitoring is finished, closing the signal processing and controlling unit (1).
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| CN201810099012.2A CN108344930B (en) | 2018-01-31 | 2018-01-31 | Device and method for monitoring temperature and partial discharge of ring main unit |
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| CN201810099012.2A CN108344930B (en) | 2018-01-31 | 2018-01-31 | Device and method for monitoring temperature and partial discharge of ring main unit |
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| CN108344930B true CN108344930B (en) | 2020-03-17 |
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| CN111948498A (en) * | 2020-07-14 | 2020-11-17 | 深圳供电局有限公司 | Partial discharge signal detection device and ring main unit |
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Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: STATE GRID SHAANXI ELECTRIC POWER Research Institute Patentee after: STATE GRID SHAANXI ELECTRIC POWER Co. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: STATE GRID SHAANXI ELECTRIC POWER Research Institute Patentee before: STATE GRID SHAANXI ELECTRIC POWER Co. |
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Effective date of registration: 20221222 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: STATE GRID SHAANXI ELECTRIC POWER Research Institute Patentee after: STATE GRID SHAANXI ELECTRIC POWER Co. Patentee after: National Network (Xi'an) Environmental Protection Technology Center Co.,Ltd. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: STATE GRID SHAANXI ELECTRIC POWER Research Institute Patentee before: STATE GRID SHAANXI ELECTRIC POWER Co. |